I am a big fan of real-time metrics extraction based on the cumulative metrics: That is to say take a snapshot each second (default interval) from the cumulative metrics and computes the delta with the previous snapshot.

The “display” option is the new one: It allows you to display the delta snap values (as previously), the average delta values since the collection began (that is to say since the script has been launched) or both.

Let’s see one example:

I want to extract real-time metrics from the %IO_TM_R% cumulative ones, for 2 cells and aggregate the results for all the cells and all the objectname (means I just want to show the metrics). I want to see each snapshots and the average since we launched the script.

So, no differences between the delta snap and the average after the first snap (which is obvious 🙂 ).

Into the “SNAP” section, the delta(s) field computes the delta in seconds of the collectionTime recorded into the snapshots (see this post for more details). Into the “AVG” section, the delta(s) field is the sum of the delta(s) field from all the previous “SNAP” sections.

Let’s have a look to the output after 2 minutes of metrics extraction to make things clear: